No sweat for Serena following sleepless evening

The thought of playing a long match in the extreme Melbourne heat resulted in a sleepless night for Serena Williams, but the world No 1 need not have worried as she strode swiftly into the Australian Open third round on Wednesday.

Trying to win the title for a sixth time, the American dynamo dispatched Vesna Dolonc of Serbia 6-1, 6-2 in just more than an hour at Rod Laver Arena before scurrying back to the cool sanctuary of the locker room.

"I kept waking up in the middle of the night last night, just paranoid," Williams said of her disrupted sleep.